Finding the Third Proportional to 2,184.79 and 3,128.94

Step by Step Solution

1. Step 1: Write the proportion equation
   2,184.79 : 3,128.94 = 3,128.94 : x
2. Step 2: Convert to fraction form
   2,184.79/3,128.94 = 3,128.94/x
3. Step 3: Cross multiply
   2,184.79x = 3,128.94 × 3,128.94
4. Step 4: Simplify right side
   2,184.79x = 9,790,274.32
5. Step 5: Solve for x
   x = 9,790,274.32/2,184.79
6. Step 6: Final answer
   x = 4,481.12